Science / Biology / Intron: In eukaryotes, bases of a gene transcribed but later excised from the mRNA prior to exporting from the nucleus and subsequent translation of the message into a polypeptide.
Science / Genetics / Introns: The dna base sequences interrupting the protein- coding sequences of a gene: these sequences are transcribed into rna but are cut out of the message before it is translated into protein. Compare exons MORE
Science / Biology / Exon: The DNA bases that code for an amino acid sequence. Exons are separated by introns that code for no amino acid sequences. MORE